/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  transition: var(--transition-normal);
}

.header.scrolled {
  background: rgba(26, 26, 46, 0.98);
  box-shadow: var(--shadow-md);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary-color);
  text-decoration: none;
  transition: var(--transition-fast);
}

.logo:hover {
  color: var(--primary-color);
  transform: scale(1.05);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-list {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-md);
  transition: var(--transition-fast);
  position: relative;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
}

.nav-link:hover {
  color: var(--secondary-color);
  background: rgba(255, 107, 53, 0.12);
  border-color: var(--primary-color);
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--secondary-color);
  transition: var(--transition-fast);
  transform: translateX(-50%);
}

.nav-link:hover::after {
  width: 100%;
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
}

.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.mobile-menu-btn span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  display: none;
  justify-content: flex-start;
  align-items: center;
  padding-top: 200px;
  opacity: 0;
  transition: var(--transition-slow);
  /* Prevent body scroll when menu is open */
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
}

.mobile-menu-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 998;
  width: 100%;
  height: 100%;
  display: none;
}

.mobile-menu.active {
  display: flex;
  opacity: 1;
}

.mobile-menu-backdrop {
  display: block;
}

.mobile-menu-content {
  background: var(--background-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  width: 100%;
  position: relative;
  box-shadow: var(--shadow-lg);
  transform: scale(0.8);
  transition: var(--transition-slow);
  z-index: 2;
}

.mobile-menu.active .mobile-menu-content {
  transform: scale(1);
}

.mobile-menu-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  text-align: center;
  width: 100%;
}

.mobile-menu-link {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  transition: var(--transition-fast);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: block;
}

.mobile-menu-link:hover {
  color: var(--secondary-color);
  background: rgba(255, 107, 53, 0.1);
  border-color: var(--secondary-color);
}

/* Mobile close button */
.mobile-close-btn {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 35px;
  height: 35px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: var(--text-primary);
  font-size: 20px;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.mobile-close-btn:hover {
  background: rgba(255, 107, 53, 0.2);
  border-color: var(--secondary-color);
  color: var(--secondary-color);
}

/* Responsive design */
@media (max-width: 767px) {
  .nav {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .header-container {
    padding: 0 var(--spacing-sm);
  }

  .logo {
    font-size: 1.1rem;
  }

  .logo-icon {
    width: 28px;
    height: 28px;
    font-size: 1rem;
  }
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }

  .mobile-menu {
    display: none !important;
  }
}

/* Animation for header */
.header.fade-in {
  animation: slideInDown 0.6s ease-out;
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}